Email Document Reference

Enter your email address below and the reference for this document will be sent to shortly from webmaster@ceesi.com.

Title: A Fast Thermal AC/DC Converter For Precision Ac Voltage Measurements
Author: Fred L. Katzmann
Source: 1989 Measurement Science Conference
Year Published: 1989
Abstract: A new dual heater multijunction thermal converter has been developed. It provides response times in order of magnitude faster than conventional thermal devices. The technique is applicable to both thermocouple and semiconductor heat sensing devices. The new thermal element has been reduced to practice by bringing two insulated heaters of a vacuum thermal element into contact. One heater sees the input signal while the second heater provides negative feedback to maintain the dual heater structure at a constant temperature. The mass of the heaters and thermocouple temperature sensors is small and the temperature variations are limnited to millidegrees centrigrade. Therefore, the response time is improved to a fraction of a second. Measurement accuracy is comparable to other hot wire thermal converters and wide band frequency capability beyond 100 MHz makes this new thermal converter applicable to precision ac-dc transfer standards and digital ac voltmeters.

In order to prevent spam and automated file downloads for documents within the Measurement Library, please follow the instructions below and then you will be able to email a reference to this article.